Removable calk for horseshoes.



PATENTED OCT. 8, 1905.

E. M. ROBERTS. REMOVABLE GALK'POR HORSESHOES.

APPLICATION FILED JAN.18. 1905.

d rd/ EDIVARD M. ROBERTS, OF PITTSBURG, PENNSYLVANIA.

REMOVABLE CALK FOR HORSESHOES.

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed an ary 18, 1905. Serial No. 241,615.

To (LI/Z whmn it flea/y concern:

Be it known that I, EDWARD M. ROBERTS, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Removable Calks for Horseshoes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to an improved removable calk for horseshoes; and it consists in the certain details of construction and combination of parts, as will be fully de scribed hereinafter.

In the accompanying drawings, Figure 1 is a plan view of a horseshoe, showing the position of the toe and heel calks, together with the means of attaching the same in position. Fig. 2 is a sectional end elevation taken through the heel of the shoe, one of the calks being in elevation and the other in section, the latter showing the hardenedsteel core. Fig. 3 is a sectional end view through one of the heels of the shoe, the calk being removed therefrom. Fig. 4 is an in verted plan view of the same. Fig. 5 is a erspective view of one of the calks removed from the shoe.

To put my invention into practice with a horseshoe 1, I form at each heel annular tapering openings 2 of a suitable diameter, the said openings being larger at the base than at the top, and two similar openings at the toe, as will be seen by reference to Fig. 1 of the drawings. Each of these openings 2 is formed with a vertical slot 4, extending from the base of the shoe upward and terminating in a segmental radial groove 3 about the periphery of the opening 2, the said groove being formed with an inclined bases, the inclination being from the slot upwar The calks used with the above-described shoe consist of a body portion 7 of tapered form having an inner core 9, the latter being of hardened steel and the former of a comparatively soft metal designed to wear away and keep the calk at all times sharp. This body portion 7 is integral with a tapering shank 5 and intermediate square portion 8, the said shank being provided with a radially-projecting lug 6, adapted to enter the slot 4 and engage with the inclined surface of the groove 3. The taper and size of the shank 5 correspond with the openings 2 of the shoe, and the length of said shank is slightly less than the thickness of the shoe, as will be seen by reference to Fig. 2 of the drawings.

At Fig. 4 of the drawings, showing an inverted plan view of one of the heels, will be seen punch-marks 12, indicating the length of the groove 3 on the other side, which, together with a similar mark 11 on the calk, showing the position of the lug 6, will act as guides, showing the operator which direction to turn the calk to remove the same from the shoe.

In operation the lug 6 is entered in the slot 4 and the shank entering the opening 2. By means of a suitable tool engaged with the square 8 the calk is wrenched in position. The lug 6 moving up the incline 3 binds the calk to the shoe. T 0 remove the calk, it is only necessary to observe the position of the mark 11 with reference to those, 12, on the shoe and turn the calk in the proper direction, and a slight tap or jar will loosen the same from its socket.

It will be seen from the above description, taken in connection with the accompanying drawings, that I have produced a simple, durable, and eificient removable calk and means for attaching the same rigidly in position, and it is obvious that slight modifications and changes may be made in the details of construction without departing from the spirit of the invention. Therefore I do not wish to confine myself to the exact'construction shown and described, but wish to claim all such modifications as would come properly within the general scope of the invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

The combination of a horseshoe having tapering openings 2 at the toe and heels, vertical slots 4, and inclined segmental grooves 3 formed with said openings, and aremovable calk, comprising the body portion 7 having a hardened central core 9, an integral shank In testimony whereof I afliX my signature 5, and intermediate square 8, the said shank in presence of two Witnesses. being tapered to fit neatly Within the openings 2, and having a radial lug 6, to engage EDWARD ROBERTS With the incline of the groove 3, all arranged Witnesses: and combined for service, substantially as JOHN MEYER,

and for the purpose described. M. K. COSTER. 

